Gas saving device and starting auxiliary fuel injector for internal-combustion engines



INVENTOR. T a/vas 6f law/r5 r97'7fli/V') 2 SHEETS-SHEET l STARTINGAUXILIARY FUEL AL-COMBUSTION ENGINES T. C. LEAKE GAS SAVING DEVICE ANDINJECTOR FOR INTERN Filed June 8 1950 Dec. 30, 1952 T. C..LEAKEGAS-SAVING DEVIFE AND STARTING AUXILIARY FUEL INJECTOR FORINTERNAL-COMBUSTION ENGINES 2 SHEETS-SHEET 2 Filed June 8, 1950INVEVTOR. Eonms @ZEAHE BY Maw MW arrak/v'y Patented Dec. 30, 1952 GASSAVING DEVICE AND STARTING AUXIL- IARY FUEL INJECTOR FOR INTERNAL-COMBUSTION ENGINES Thomas C. Leake, New York, N. Y.

Application June 8, 1950, Serial No. 166,848

Claims.

This invention relates to internal combustion engines used in motorvehicles, and particularly to engines in which the fuel-air mixture issupplied to the cylinders of the engine by means of a carburetor,through an intake manifold.

A portion of the unit described and claimed herein represents animprovement on the Fuel Injector for Starting Internal CombustionEngines, shown in my co-pending application, Serial Number 155,325,filed April 11, 1950, now Patent 2,582,637, January 15, 1952.

The primary portion of the apparatus, comprises a fuel atomizing device,mounted in the intake manifold of an engine, for the purpose ofimproving the atomization and distribution of the fuel, suspended in thefuel-air mixture, fed from the carburetor through the intake manifold,to the engine cylnders, and to reduce the deposit of liquid fuel, formedon the inner surface of the walls of the intake manifold to a minimum.

With the wide variety of fuels available for motor vehicle engines, andthe extreme and varied conditions through which these engines mustoperate, obtaining a uniform mixture of vaporized or finely divided fueland air from a carburetor, and distributing the mixture through themanifold to the various cylinders, in such a manner as to obtain uniformmixtures in all of the cylinders,

regardless of their relative distance from the inlet pipe at the centerof the manifold, has always presented an extremely difficult problem.

The abrupt change of direction of the fuelmixture, when it enters thewell of the manifold from the intake pipe, and passes through thetubular passagesof the manifold, causes a portion of the particles offuel, because of their inertia, to leave the main stream of the fuelmixture and be deposited on the manifold walls. This changes the ratioof fuel in the fuel-air mixture, resulting in a leaner mixture being fedto the cylinders than that delivered by the carbureter, with consequentinefficient combustion and uneven operation of the cylinders.

Another of the problems encountered in fuels of relatively lowvolatility, particularly in cold weather, and during the startingperiod, when the intake manifold is cold, is the deposit of liquid fuelon the inner walls of the manifold, from the mixture fed to the manifoldby the carbureter.

After a certain amount of liquid fuel is depositted on the manifoldwalls, subsequent charges of fuel-air mixture, from the carburetor, tendto pick up a portion of the liquid fuel from the manifold walls andcarry it to some of the cylinders.

Due to the higher relative weight of the liquid fuel, it is carried onlya short distance, and tends to concentrate in the cylinders closest tothe invide an atomizing device, mounted within the manifold of anengine, to aid in the equal distri-. bution of the fuel-air mixturethrough the manifold, to attain a better ratio of air and gas, and toimprove the vaporization of the fuel-air mixture supplied to thecylinders.

A further object is to provide an atomizing device which can beinstalled in an engine of the conventional type, without machine work,or re moving any of the major parts of the engine, or interfering withthe carbureter adjustment, in the process of installation. I

A further object is to combine with the fuel atomizing unit, amanually-controlled device, which will inject a spray of finely dividedliquid fuel, through the atomizing unit, into the manibureter, theauxiliary fuel tubes, and the-injec fold, to facilitate starting theengine in cold weather.

Another object is to provide a combined -support for the atomizin unit,and the starting fuelinjection device, so they can be installedsimultaneously, and be supported by the manifold and carbureter withoutadditional support elements, other than those normally provided ininternal combustion engines.

A fundamental object is to provide a simple, compact device, which maybe produced at relatively low cost, and can be installed andoperated bypersons without special skills or experience.

The accompanying drawings, illustrative of one embodiment of myinvention, together with the description of its construction and themethod of installation and operation thereof, will serve to clarifyfurther objects and advantages of my invention.

In the drawings:

Fig. 1 represents a side elevation of the carbureter assembly, showingthe starting fuel in jection mechanism, and a vertical section throughthe intake manifold, and the manifold venturi, taken at l-l, Fig, 2.

Fig. 2 is a front elevation of the carbureter and the auxiliary fueltubes, of Fig. 1, and a vertical cross-section through the intakemanifold, taken at 2-2, Fig. 1. 1

Fig. 3 is a plan view of a portion of the cartion control valve, of Fig.1, with a portion of the carburetor removed, to show intake pipe sectionof the intake manifold, and the venturi.

Fig. 4 is a rear elevation of the unit, showing the front of the valvesu port bracket plate, and the valvecontrol lever of Fi s. .1 and 2.

Fig. 5 represents a vertical section through the insert flange and theventuri of Fig. 1 and a partial rear view of the venturi, taken at 5-5,Fig. 1.

Fig. 6 is a plan view of the insert flan e, the manifold venturi, andthe injector :tube, of Figs. 1 and 5.

It will be understood that the following description of theconstruction, installation and method of operation of the auxiliary fuel'iniector and atomizer, is intended as explanatory of the invention andnot restrictive thereof In the drawings, the same reference numeralsdesignate the same parts throu hout the various views, except whereotherwise indicated.

Figs. 1 and 2 show the carburetion system of the ,conventional type ofmotor vehicle internal cdmbustion engine, comprising a carbureter iii,whi ch ieeds a mixture of fuel and. air'through'an intake ,manifold H,to the cylinders, the liquid fuel being supplied to the carbureter fromthe fuel tank, by a tubular fuel line '92, with a starting auxiliaryfuel injection attachment inserted between the fuel line and themanifold, and a Venturi tube 14, for deflecting "the'fue'l-air mixtunefrom the carburetor, and the fuel from the auxiliary fuel iniector,anddirecting the fuel-air mixture along the manifold passages, mountedin the intake .pipe section 115 of theintake manifold.

In the .,construction,,shown in Figs. 1, 2 and '3, a T 1.6, or othersuitable type of fitting, may be threadably insertedinto the carbureterfuel line opening, by means of pipe threads, or other suitable form ofthreads, formed at the end of main body 'I! of the T, the opposite endthreadably receiving the threaded end ,of an adapter it, the oppositeend of which fits into a tube coupling nut 20, the flared end of thefuel line tube I2, being gripped between the coupling nut and the ada teAn auxiliary fuel tube 21, of smaller diameter, than the regular fuelline, may be attached to the perpendicular leg 22 of the T, to connectthe T with .a rotating stern, tapered seat, or other suitable form ofvalve assembly 23, mounted on the plate 2%, of an L-shaped bracket .25,or a plate, attached to the instru en bo r of h vehicle, or .mounted atany other suitable point in the driving compartmen .of the vehionvenient to the driver.

An auxiliary return tbue 23, similar to the auxiliary-tube 2 i, may beincorporated, to connect the opposite end of the valve 23 with an insertflange 29, interposed between the carbureter flange .30, and themanifold flange 3 l, as indicated in Fig. 1.

One end of the auxiliary tube may be connected to the perpendicular leg22 .of the T, by means of an adapter .32, to which a tube coupling nut33 is threadably fitted, the flared end oiv the tube being grippedbetween the coupling nut and the adapter.

An elbow 35, a T, or other suitable type of fitting, may be threadablyfitted to the inlet end of the body 36, of the valve assembly 23, the;threads formed on the perpendicular leg 31 of the elbow, being insertedinto an opening formed in the valve body, the body 38 .of the elbowbeing connected to one end of the auxiliary tube, by

4 means of a coupling nut 33!), threadably attached to the opposite endof the body 38, of the elbow, the threads formed in the body of theelbow, and the coupling nut, supporting the flared end of the tube 2!.

In the construction shown in Fig. 3, an extension of the body of theelbow, mayybe attached to the bracket plate 24, by means of a screw 40,or other suitable attaching means, the valve body 36, being supportedbetween the two elbows 35 andfifm, mounted on opposite sides of thevalve.

The valve '23 may be directly attached to the bracket plate .24 by meansof straps, screws, or

othersuitableattaching means, an elbow or other suitable fitting, beingutilized to connect the valve with the "and .of the auxiliary tube, inplace of the screwed elbow shown in Fig. 3.

A similar elbow, or fitting 35a, may be attached to the opposite end ofthe valve body, and supported :on :the plate bracket, in substantiallythe same manner, a coupling nut 330, being threadably attached to thebody of the elbow, to

support one end of the auxiliary return tube '28.

The insert flange 29, mounted between the carbureter flange 30, and theintake manifold flange3 l, maybe clamped between the carbureter andintake manifold flanges, by the studs 4!, which are replacement studs,longer than the studs which normally attach the intake manifold flangeto the carburetor flange, unless the 'regular carburetor flange studsare long enough to take thesadded thickness of the insert flange,Vellumoid, paper or'other suitable form of gaskets 42, may .befin'sertedbetween the carbureter and manifold flanges, "and the correspondingfaces of the insert flange 29, to seal the carburetor openings.

As indicated in Figs. 1 and 3, a boss 43 maybe formed integral with, orattached to the insert flange Ethan adapter 32a, threadably fitted to anopening formed in the boss, and a coupling nut 33a, threada-bly mountedthereon, connecting the inner end of the auxiliary return tube 28 to theinsert flange.

A small diameter, formed injector tube 45, may beinserted in andsoldered, brazed, or otherwise attached to an opening formed in a boss46, attached to, or formed integral with the insert flange, asubstantially horizontal opening, formed in the flange, and the boss,connecting the inlet opening 41, in-the insert boss, Fig. 6, with theinterior of the injector tube and the auxiliary return tube 28.

The injector tube may be bent, :as indicated in Fig.1, the free end 48,fitting into the formed central opening 50, formed in the manifoldventuri l4, mounted in the intake pipe section I5, of the manifold. Thefree end 48, of the injector tube may have an outlet opening formedtherein, the opening being of substantially the same size as that of thebalance of the tube, or the free end of the tube may be swaged inward,.to reduce the size of the outlet opening in the injector tube.

The venturi M, which is mounted in the center of the intake pipe section:5, of theintake manifold, as indicated in Figs. 1 and 2, comprises ashaped tubular upper section 53, which flares outward as indicatedinFig. l, the lower end connecting with two horizontal substantiallycylindrical sections 55 and 55a, formed integral therewith, and locatedin substantially the center of the manifold passages 56.

The inlet opening 59', at the upper end of the venturi, connected withtwo substantially .circular .outlet openings 51 and 51a. formed at the.bot-

tom of the venturi, a pair of fillets 58, of relatively large radius,formed at the center of the outlet openings, which meet at a point 59,at the center of the inlet opening, divide the fuel-air mixture, fedfrom the carburetor, through the in let opening of the venturi, into twosections, which pass through the outlet openings of the venturi, fromwhich they pass into the intake manifold passages, the path of themixture at the venturi outlets following the axis of the manifold tubepassages, thus directing the mixture toward the cylinders, located atboth sides of the manifold intake pipe section.

This results in better atomization of the fuel, as it passes from thecarbureter to the intake manifold, eliminates the sharp change indirection, when the fuel-air mixture normally strikes the wall of themanifold, thus reducing manifold condensation, and the deposit of liquidfuel on the inner wall of the manifold, to a minimum, and obtaining moreuniform fuel distribution in the cylinders.

The venturi I4 may be attached to the insert flange by two sloping armsEll, of rectangular or other suitable cross-section, the lower end ofwhichare attached to, or formed integral with the outer wall of theventuri, with the upper end thereof cast integral with the oppositesides of the wall, surrounding the central opening 6| of the insertflange, or attached to the wall of the flange by soldering, brazing, orother suitable attaching means.

The free end of the injector tube extends into the center of the venturiI4, as indicated in Fig. 1, the outlet end being in substantialalignment with the restricted area 62, near the top of the venturiopening.

The insert flange assembly may be mounted in the engine by removing thetwo nuts 63, mounted on the studs M, connecting the carbureter outletflange 3D, with the intake manifold flange 3|, and lowering themanifold, or raising the carburetor, whichever is more convenient. Thetwo gaskets 42, mounted between the insert flange and the carbureter andmanifold flanges, respectively, are then inserted, the insert flangeassembly mounted in the position shown in Fig. 1, and the two studs, orlonger replacement studs lll, inserted in the openings formed in thecarbureter flange, after which the nuts 63 are replaced, the assemblybeing complete except for the assembly of the auxiliary tube 2|, and theauxiliary return tube 28.

The fuel spray, which passes through the injector tube, is started whenthe valve 23 is opened a by angularly moving the valve-actuating lever54, shown in Fig. 4, the fuel passing directly into the venturi, fromthe auxiliary return tube 28.

In the venturi, the spray of finely atomized fuel mixes with the streamof air, and finely divided, or vaporized fuel, which is further brokenup as it passes through the venturi, thus providing an additional supplyof finely atomized fuel, the combined mixture passing along the intakemanifold passages, into the individual cylinders, thus greatlyfacilitating the starting of the engine, particularly in cold weather,or when low end-point fuels are used.

In installing the unit, shown in Figs. 1, 2 and 3, in the conventionaltype of motor vehicle, the fitting connecting the fuel line I2 to thecarburetor is removed and replaced by the T l 6, shown in Fig. 3, theadapter I8 being inserted between the fuel-line coupling nut 20, and theT, to reconnect the fuel line to the carburetor.

The valve plate bracket assembly, shown in Figs. 3 and 4, may beassembled by connecting the two valve elbows 35 and 35a, or fittings, tothe two ends of the valve body, by inserting the tapered pipe threads,or other suitable form of thread, formed in the perpendicular leg 31, ofeach of the valve elbows 35 and 35a, into the threaded openings, at theends of the valve body.

The valve actuating lever 64, attached to the valve stem, may beprojected through an opening 61, formed in the bracket plate, as shownin Fig. l, after which the screws All may be inserted through the plate24 into the valve elbows, to attach the elbows and the valve assembly tothe plate bracket.

The right-angle flange 58 may be attached to the instrument panel of thevehicle, in the front of the drivers compartment, by means of screws it,bolts and nuts, depending upon the location of the bracket and theconstruction of the instrument panel.

The two ends of the auxiliary tube 2| may be connected to the carburetorT It and the valve elbow 35, by means of the adapters 32 and couplingnuts 33.

The insert assembly, including the venturi and the injector tube, may bemounted between the carburetor and the manifold flanges, the venturi andthe injector tube being inserted in the manifold, in the mannerhereinbefore described.

The two ends of the auxiliary return tube may be connected to the valveelbow 35, and the boss 53, of the insert flange, by thread-ablyinserting the adapter in the opening formed in the flange boss at oneend, and connecting a coupling nut, with the flared end of the tubemounted therein, to the opposite end of the adapter, in the flange boss,and directly connecting a coupling nut to the threads formed in the bodyof the elbow at the opposite end.

The construction of the insert flange 29, the outer contour thereof andthe size, location, and spacing of the stud openings may be altered tosuit the requirements of the carburetor of the engine, for which aparticular installation is designed.

The valve assembly 23, shown in Figs. 3 and 4. may be of the rotatablestem type, seated in a tapered seat, or any other suitable form of valvemay be substituted therefor.

The valve-actuating lever 56, as shown in Figs. 3 and a, may be of thetype indicated, or a control knob, or other suitable type ofvalve-actuating mechanism may be substituted therefor.

A coiled torsion spring, or other suitable type of spring, or automaticvalve closing device, may be mounted on the stem of the valve, andattached to the valve-actuating lever, to automatically shut oil thevalve, when the operator removes his fingers from the control lever.

The valve plate bracket 25, shown in Figs. 1 and 4 may be made in theform indicated, with a perpendicular attaching flange formed integralwith the plate, or a flat plate may be attached directly to theinstrument panel, by a plurality of bolts, screws, or other suitableattaching means, the valve control lever projecting through an openingformed in the instrument panel.

All parts of the unit, except the insert flange, would be suitable foruniversal application for all types of vehicles, the auxiliary tube andthe auxiliary return tube being cut to the length required, dependingupon the relative location of the carbureter, and the instrument panel,the tubes being bent, as required, to clear any obstructions, and tojoin the fittings in the required relative position.

The construction may be applied to internalcombustion engines, used inmarine, stationary, industrial, or other types of installation, withequal facility to its adaptation to motor vehicles.

The size, form, and'contour of the venturi may be altered considerably,depending upon the size and form of the manifold, and the distancebetween the manifold flange and the fuel-air passages, formed in themanifold.

In internal-combustion engines having eight or more cylinders, and fedby a carburetor having a dual throat, two injector tubes may be mountedon the insert flange, in place of the one shown in Figs. 1 and 5, eachtube fitting into the corresponding intake pipe section of the intakemanifold.

In such installations, a double-inlet venturi, or a venturi fitted witha long, oval-shaped inlet opening, may be provided, the outlet openingsof the venturi facing in opposite directions, as indicated in Fig. 1,each outlet opening being connected to one of the inlet openings of theventuri.

In place of the dual-inlet venturi, two separate venturis may beprovided, in installations of this type, each venturi being fed by oneof the openings in the carburetor. In such installations, each venturiwould be substantially L shaped, there being only one outlet opening ineach venturi, the two outlet openings facing opposite directions.

The venturi, or fuel atomizing portion of the unit functions at alltimes, while the engine is in operation, to atomize the fuel in thefuel-air mixture, and direct the mixtur along the passages in the intakemanifold.

The fuel injection apparatus operates only when the engine is beingstarted, when the operator manually opens the auxiliary fuel Valve, theauxiliary fuel supply, through injector tube, being shut off again, whenthe engine is started, and the auxiliary fuel valve closed.

The installation requires no special tools, equipment, or skill on thepart of the mechanic making the installation, beyond that usuallypossessed by the ordinary mechanic engaged in this work.

It will be apparent to those skilled in the art that my presentinvention is not limited to the specific details described above andshown in the'drawings, and that various further modifications andadaptations are possible, in carrying out the features of the inventionwithout departing from the spirit and scope of the appended claims.

What I claim is:

1. An attachment for an internal-combustion engine, fitted with acarburetor, a fuel line, and an intake manifold, comprising an insertmounted between the carburetor and the intake manifold, a venturi,attached to said insert, mounted in the intake manifold, said venturihaving a pair of oppositely directed outlets, formed in substantialalignment with the intake manifold passages, said Venturi outletsdirecting the fuelair mixture from the carburetor, along the intakemanifold passages, an injector tube attached to said insert, the outletend of said injector tube, projecting into the venturi, means connectingsaid injector tube to the fuel line, valve means controlling the flow offuel to said injector tube, and means manually controlling said valvemeans. 1

2. An attachment for an internal-combustion engine, fitted with acarburetor, a fuel line, and an intake manifold, comprising an insertflange, mounted between the carburetor and the intake manifold, aventuri attached to said insert flange, mounted in the intake manifold,said venturi comprising an inlet section mounted in substantialalignment with the intake manifold carburetor opening, with a pair ofoppositely directed outlets formed in said venturi, in directcommunication with the inlet section, and in substantial alignment withthe intake manifold passages, said outlets directing the fuel-airmixture from the carbureter, along the intake manifold passages,injection means attached to said insert flange, said injection meansprojecting into the mixture directing means, auxiliary fuel tubesconnecting said injection means to the carburetor fuel line,manually-operated valve means controlling the flow of fuel from the fuelline to the injection means, a portion of the fuel from the fuel linebeing sprayed through the injection means and the Venturi outlets intothe manifold passages, when the valve is opened.

3. An attachment for an internal-combustion engine, fitted with acarbureter, and an intake manifold, comprising an insert flange, mountedbetween the carbureter and the intake manifold, and a venturi, attachedto said insert flange, mounted in the intake manifold, said venturicomprising an inlet section, mounted in substantial alignment with theintake manifold carburetor opening, with a pair of oppositely directedoutlets formed in said venturi, in direct communication with the inletsection, and in substantial alignment with the intake manifold passages,said Venturi outlets directing the fuelair mixture from the carburetor,along the intake manifold passages.

l. An attachment for an internal-combustion engine, fitted with acarburetor, and an intake manifold comprising an insert flange,interposed between the carbureter and manifold flanges, a venturiremovably mounted in said intake manifold, a pair of arms, formedintegral with said venturi, attached to the insert flange, said venturicomprising an inlet section, mounted in substantial alignment with theintake manifold carburetor opening, said venturi having a pair ofoppositely directed outlet passages formed therein, in communicationwith the inlet and in sub stantial alignment with the manifold passages,a pair of arcuate wall fillets separating said Venturi outlet passages,said fillets and Venturi outlet passages directing the fuel-air mixturefrom the carburetor, along the intake manifold passages.

5. In a vehicle, driven by an internal-combustion engine, fitted with acarburetor, a fuel line, and an intake manifold, an attachment,comprising a fitting interposed between the carbureter and the fuelline, an insert flange, mounted between the connecting flanges of thecarbureter and the intake manifold, a venturi, attached to said insertflange, mounted in the intake manifold, said venturi having outletsformed in substantial alignment with the intake manifold passages, aninjector tube attached to said insert flange, the outlet end of saidinjector tube projecting into the venturi, auxiliary fuel tubesconnecting said insert flange and the injector tube to the carbureterfitting, a valve, mounted in the driving compartment of said vehicle,connected into said auxiliary fuel tubes, means manually controllingsaid valve, a portion of the fuel from the fuel line being sprayedthrough the injector tube and the venturi, into the manifold passages,when the valve is opened.

6. In a motor vehicle, driven by an internalcombustion engine, fittedwith a carbureter, a fuel line, and an intake manifold, an attachment,comprising a fitting interposed between the carbureter inlet and thefuel line, an insert flange interposed between the carbureter outlet andthe intake manifold, means clamping the insert between the carbureterand the manifold, a venturi, attached to said insert flange, mounted inthe intake manifold, said venturi comprising an inlet section, mountedin substantial alignment with the intake manifold opening, with outlets,formed in said venturi, in communication with the inlet and located insubstantial alignment with the intake manifold passages, an injectortube attached to said insert, the outlet end of said injector, tubeprojecting into the venturi, auxiliary fueltubes connecting said insertflange and the injector tube to the fuel line fitting, a valve mountedin the operating section of said vehicle, connected into said auxiliaryfuel tubes, means manually controlling said valve, a portion of the fuelfrom the fuel line being sprayed through the injector tube and theventuri, into the manifold passages, when the valve is opened.

'7. In a vehicle, driven by an internal-combustion engine, fitted with acarburetor, a fuel line, and an intake manifold, an attachment,comprising an insert flange. interposed between the outlet end of thecarbureter and the intake manifold, a venturi, attached to said insert,mounted in the intake manifold, said venturi directing the fuel-airmixture from the carbureter, along the intake manifold passages,auxiliary fuel tubes connecting the carbureter fuel line to the insertflange, a tubular injector attached to the insert flange, the outlet endof said injector projecting into the venturi, said insert flange havinga plurality of passages formed therein, connecting the auxiliary fueltube with the injector tube, a valve, mounted in the operating sectionof said vehicle, connected into said auxiliary tubes, means, attached tothe vehicle, supporting said valve, a lever, manually controlling saidvalve, projecting through the support means, a portion of the fuel fromthe fuel line being sprayed through the injector tube and the venturi,into the intake manifold passages, when the valve is opened.

8. In a vehicle, driven by an internal-combustion engine, fitted with acarbureter, a fuel line, and an intake manifold, an attachment,comprising a fitting interposed between the carbureter and the fuelline, an insert flange, interposed between the outlet end of thecarbureter and the intake manifold, a venturi, attached to the insertflange, mounted in the intake manifold, said venturi directing thefuel-air mixture from the carbureter, along the intake manifoldpassages, an injector tube attached to said insert flange, the outletend of said injector tube projecting into the venturi, a valve mountedin the driving compartment of the vehicle, a bracket attached to thevehicle, a pair of tube fittings, attached to the bracket, connectedwith and supporting the valve, an auxiliary fuel tube connecting thecarbureter fitting to one of said tube fittings, an auxiliary returntube connecting the opposite fitting to the insert flange, said insertflange having a plurality of passages formed therein, connecting theauxiliary return tube to the injector tube, a valve control leverprojecting through said bracket, a portion of the fuel from the fuelline being sprayed through the injector tube and the venturi, into themanifold passages, when the valve is opened.

9. In a vehicle, driven by an internal-combustion engine, fitted with acarbureter, a fuel line, and an intake manifold, an attachment,comprising a fitting interposed between the carbureter and the fuelline, an insert flange, mounted between the connecting flanges of thecarbureter and the intake manifold, a venturi, attached to said insertflange, projecting into the intake manifold, said venturi having aplurality of outlets formed in substantial alignment with the intakemanifold passages, an injector tube attached to said insert, the outletend of said injector tube projecting into the venturi, auxiliary fueltubes connecting said insert flange and the injector tube to thecarbureter fuel line fitting, a valve, mounted remotely from saidengine, connected into said auxiliary fuel tubes, a control handlemanually controlling said valve, means supporting said valve, and thetube ends attached thereto, on the vehicle, a portion of the fuel fromthe fuel line being sprayed through the injector tube and the venturi,into the manifold passages, when the valve is opened.

10. In a motor vehicle driven by an internalcombustion engine, fittedwith a carbureter, a fuel line, and an intake manifold, an attachment,comprising a fitting interposed between the carbureter inlet and thefuel line, an insert flange interposed between the carbureter outlet andthe intake manifold, means clamping the insert flange between thecarbureter and the manifold, a venturi, attached to the insert flange,projecting into the intake manifold, said venturi comprising an inletsection, mounted in substantial alignment with the intake manifoldopening, with a plurality of outlet formed in said venturi,substantially perpendicular to the inlet, located in substantialalignment with the intake manifold passages, means separating saidoutlets to direct the fuel-air mixture through the intake manifoldpassages, an injector tube attached to said insert, the outlet end ofsaid injector tube projecting into the venturi, auxiliary fuel tubesconnecting said insert flange and the injector tube to the carbureterfuel line fitting, a valve, mounted remotely from said engine, connectedinto said auxiliary fuel tubes, a bracket, supporting said valve, andthe tube ends attached thereto, on the vehicle, a handle manuallycontrolling said valve, a portion of the fuel from the fuel line beingsprayed through the injector tube and the venturi, into the intakemanifold passages, when the valve i opened.

THOMAS C. LEAKE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,370,801 Elwell Mar. 8, 19211,456,018 Wiegand May 22, 1923 1,646,321 Siegmann Oct. 18, 19271,704,832 Higgins Mar. 12, 1929 FOREIGN PATENTS Number Country Date265,767 Italy of 1929

